.main-container {
  position: relative;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
}

.main-container .main-header {
  position: relative;
  width: 100%;
  height: 40px;
  box-sizing: border-box;
  background-color: #28303e;
}

.main-container .main-body {
  position: relative;
  width: 100%;
  height: calc(100% - 40px);
  display: flex;
  box-sizing: border-box;
}

.main-container .main-body .main-content {
  position: relative;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  transition: width 0.5s ease-in-out;
}

.main-container .main-body .main-sidebar {
  position: relative;
  width: 0;
  height: 100%;
  box-shadow: 0 -1px 10px 0.5px #ffffff;
  box-sizing: border-box;
  background-color: #28303e;
  transition: width 0.5s ease-in-out;
}

.main-container .app-setting {
  position: absolute;
  height: 700px;
  width: 600px;
  top: calc(50% - 350px);
  left: calc(50% - 300px);
  box-sizing: border-box;
}
